public void AtomVsVariableBoundToSameAtom()
{
Assert.IsTrue(EngineInternals.AreEqual(
new Variable("X")
{
BoundTo = new Atom("X")
},
new Atom("X")));
}
// ReSharper disable ParameterTypeCanBeEnumerable.Local
private static bool AreEqual(List lhs, List rhs)
// ReSharper restore ParameterTypeCanBeEnumerable.Local
{
var e1 = lhs.GetEnumerator();
var e2 = rhs.GetEnumerator();
while (true)
{
bool more1 = e1.MoveNext();
bool more2 = e2.MoveNext();
if (more1 && more2)
{
if (!EngineInternals.AreEqual(e1.Current, e2.Current))
{
return(false);
}
}
else
{
return(more1 == more2); // lists are of same length
}
}
}
public void UnboundVariableVsAtom()
{
Assert.IsFalse(EngineInternals.AreEqual(
new Variable("X"),
new Atom("X")));
}
public void TwoEmptyLists()
{
Assert.IsTrue(EngineInternals.AreEqual(
new List(new IValue [] {}),
new List(new IValue [] {})));
}
public void TwoListsOfLengthTwoThatAreEqual()
{
Assert.IsTrue(EngineInternals.AreEqual(
new List(new IValue [] { new Atom("x"), new Atom("y") }),
new List(new IValue [] { new Atom("x"), new Atom("y") })));
}
public void ListVsAtom()
{
Assert.IsFalse(EngineInternals.AreEqual(
new List(new IValue [] { new Atom("x") }),
new Atom("y")));
}
public void TwoAtomsThatAreNotEqual()
{
Assert.IsFalse(EngineInternals.AreEqual(new Atom("x"), new Atom("y")));
}